Pen



FIG. 1 is a right side perspective view of a pen showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top view thereof;

FIG. 7 is a bottom view thereof; and,

FIG. 8 is a front view of the pen, the pen body and the pen cap shown inan exploded condition.

The ornamental design for a pen, as shown and described.